Collapsible exercise bicycle

ABSTRACT

A collapsible exercise bicycle mainly has a front wheel rod, a rear wheel rod and a diagonal rod; a handlebar is disposed at the top end of the front wheel rod and a saddle is mounted on the diagonal rod; both of the rear wheel rod and the diagonal rod are respectively connected in two segments; the connected ends thereof are disposed with retaining devices; wherein a fastening base with a rotatable moving piece is disposed on the retaining device; a press bar pivotally connects with the moving piece for coupling the fastening base; by controlling the press bar retains and detaches in a notch of the fastening base, the diagonal and the rear wheel rods can be fastened for the user to ride and made into a foldable state for folding the bicycle body into a smaller volume convenient for transportation, storage or placement in a backpack for carrying.

BACKGROUND OF THE INVENTION

[0001] 1) Field of the Invention

[0002] The present invention relates to a collapsible exercise bicycle,more particularly to a bicycle structure easy to be assembled,dismantled or folded to facilitate transportation, storage or placementin a backpack for carrying.

[0003] 2) Description of the Prior Art

[0004] Accordingly, due to the recent awareness of environmentalprotection and emphasis on leisure exercise; exercise bicycles capableof providing exercise and entertainment have become popular; in any kindof configurative design, to transport a huge and heavy exercise bicycleto a field is always a troublesomeness to the user; even when not inuse, it occupies too much storage space and that is very undesirable;since those shortcomings have troubled and been criticized bymanufacturers and consumers for a long time, to provide an improvedstructure of a collapsible exercise bicycle capable of increasing theefficiency and enhancing the practical value of the said product istruly necessary and is also the motive of the present invention.

SUMMARY OF THE INVENTION

[0005] Therefore the primary objective of the present invention is toprovide a collapsible exercise bicycle to reduce the volume and theoccupied space thereof for facilitating transportation and storagethrough simple folding movements.

[0006] The said exercise bicycle comprises a wheeled front wheel rod, awheeled rear wheel rod and a diagonal rod; a handlebar is disposed atthe top end of the front wheel rod and a saddle is mounted on thediagonal rod; wherein, both of the rear wheel rod and the diagonal rodare respectively connected in two segments; the connected ends thereofare disposed with retaining devices for fastening and securing theexercise bicycle for riding; the unlocking of the retaining device makesthe said real wheel and the diagonal rods to fold and reduce the volumeof the bicycle.

[0007] The retaining device of the said exercise bicycle comprises afastening base and a rotatable moving piece pivotally connectedtherewith; the moving piece pivotally connects with a press bar forcoupling the fastening base; thereby the said press bar is retained andsecured in a notch of the fastening base; the press bar detaches fromthe notch for unlocking and for making the real wheel rod and thediagonal rod into a foldable state.

[0008] To enable a further understanding of the structural features andthe technical contents, the brief description of the drawings below isfollowed by the detailed description of the preferred embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]FIG. 1 is a schematic and pictorial drawing of the presentinvention.

[0010]FIG. 2 is a schematic drawing of an exemplary embodiment offolding the present invention.

[0011]FIG. 3 is a schematic, exploded and pictorial drawing of aretaining device of the present invention.

[0012]FIG. 4 is a schematic drawing of an exemplary embodiment of themovement of the retaining device of the present invention.

[0013]FIG. 5 is a schematic drawing of another exemplary embodiment ofthe present invention.

[0014]FIG. 6 is a schematic drawing of another exemplary embodiment ofthe present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Referring to FIGS. 1, 2, 3 and 4, the schematic and pictorialdrawing, the schematic drawing of the exemplary folding embodiment, theschematic, exploded and pictorial drawing of a retaining device as wellas the schematic drawing of an exemplary embodiment of the movement ofthe retaining device of the present invention, the present inventionmainly comprises a front wheel rod (1), a rear wheel rod (2) and adiagonal rod (3) connecting with the said front wheel and rear wheelrods (1, 2); a foldable handlebar (11) is disposed on the top rim of thesaid front wheel rod (1) and a front rotary wheel (12) is disposed atthe bottom end thereof; a real rotary wheel (21) is disposed at thebottom end of the said rear wheel rod (2) and a pair of opposite pedalrods (22) are disposed at the area adjacent to the said rear rotarywheel (21); a saddle (31) is mounted on the top rim of the said diagonalrod (3) to thereby comprise a exercise bicycle (100) to allow the userto sit on the saddle (31) and to hold the handlebar (11) for makingforward riding and sliding movements.

[0016] Both of the area of the real wheel rod (2) adjacent to thediagonal rod (3) and the area of the said diagonal rod (3) adjacent tothe front wheel rod (1) are disposed in two segments; the connected endsthereof are respectively disposed with a retaining device (4); wherein,the said retaining device (4) is disposed with a substantially U-shapedfastening base (41); a fastening hole (411) is disposed on the rear rimof the lateral plate of the said fastening base (41); the center of thelateral plate is disposed with a concave slot (412) and a notch (413) isdisposed at the front rim of the horizontal plane; a moving piece (42)is disposed with a front and a rear shaft cylinders (421, 422) as wellas a wing piece (423) disposed respectively on two sides; the said frontshaft cylinder (421) is disposed with a notch (43); through the rearshaft cylinder (422), the said moving piece (42) is fastened to thefastening holes (411) on the fastening base (41) by means of atransverse rod (44) into a rotary state; the notch (43) of the frontshaft cylinder (421) of the moving piece (42) is inserted by atransverse rod (44) and a spring (45); furthermore, a screw rod (46)inserted by a spring (461) inserts through the said notch (43) and isthen locked to a screw (462); the other end of the screw rod (46)inserted by a ring body (463) and a bushing ring (464) is then firmlylocked to a press bar (47).

[0017] Through the assembly of the said members, a exercise bicycle(100) is thereby comprised; when the retaining device (4) couples withthe fastening base (41) by means of the moving piece (42), the press bar(47) retains in the notch (413) to clip the wing piece (423) in theconcave slot (412), an entire exercise bicycle (100) is therebyassembled for riding; when the press bar (47) detaches from the notch(413), the said rear wheel rod (2) and the diagonal rod (3) are in afoldable state ready for folding and reducing the volume of the exercisebicycle (100) to facilitate transportation, storage or placement in abackpack for carrying.

[0018] Referring to FIGS. 5 and 6, the schematic drawing of anotherexemplary embodiment of the present invention, big and small gears (5,6) can be disposed respectively on the rear wheel rod (2) and the rearwheel (21); the big and the small gears (5, 6) are connected by adriving chain (7) to comprise a exercise bicycle (100) to be pedaled onpedals (51) to move forwards; when not in use, it can be folded into asmaller volume to facilitate transportation, storage and placement in abackpack for carrying.

[0019] In summation of the abovementioned, the present invention usesthe disposed retaining devices to make the exercise bicycle capable ofbeing assembled, dismantled and folded through simple operations tofacilitate transportation and eliminate too much occupied space. It isof course to be understood that the embodiment described herein ismerely illustrative of the principles of the invention and that a widevariety of modifications thereto may be effected by persons skilled inthe art without departing from the spirit and scope of the invention asset forth in the following claims.

1. A collapsible exercise bicycle mainly comprises a front wheel rod, arear wheel rod and a diagonal rod connecting with the said front wheelrod and the rear wheel rod; a handlebar and a front rotary wheel arerespectively disposed on the top rim and the bottom rim of the saidfront wheel rod; a real rotary wheel is disposed at the bottom end ofthe said rear wheel rod and a pair of opposite pedal rods are disposedat the area adjacent to the said rear wheel rod; a saddle is mounted onthe top rim of the said diagonal rod to thereby comprise a exercisebicycle to allow the user to make forward riding and sliding movements;the present invention is characterized that: both of the area of thereal wheel rod adjacent to the diagonal rod and the area of the saiddiagonal rod adjacent to the front wheel rod are disposed in twosegments; the connected ends thereof are respectively disposed with aretaining device; wherein, the said retaining device is disposed with asubstantially U-shaped fastening base; a fastening hole is disposed onthe rear rim of the lateral plate of the said fastening base; a notch isdisposed at the front rim of the horizontal plane; a moving piece isdisposed with a front and a rear shaft cylinders; the said front shaftcylinder is disposed with a notch, thereby through the rear shaftcylinder, the said moving piece is pivotally connected to the fasteningholes on the fastening base in a rotary state; through the notch, thefront shaft cylinder of the moving piece is connected to a screw rodinserted by a spring; the other end of the screw rod is disposed with apress bar, thereby the moving piece couples with the fastening base toassemble an exercise bicycle for riding; the moving piece detaches fromthe securing base to make the said rear wheel rod and diagonal rod intoa foldable state ready for folding the exercise bicycle into a reducedvolume to facilitate transportation, storage or placement in a backpackfor carrying.
 2. A collapsible exercise bicycle according to claim 1,wherein the center of the lateral plate of the said fastening base isdisposed with a pair of opposite concave slots; a pair of opposite wingpieces are disposed on the longitudinal sides of the moving piece tocompose a positioning function when the said moving piece couples thefastening base.
 3. A collapsible exercise bicycle according to claim 1,wherein big and small gears can be disposed respectively on the rearwheel rod and the rear wheel; the big and small gears are connected by adriving chain; the axial center of the said big gear is disposed withfoot pedals to comprise a exercise bicycle.